I Started to Rise from the First Battle of Songhu:

A heavy-armored composite brigade and senior military expert in China accidentally crossed Song Ling of the 524th Regiment of the 88th Division after the December 28th Incident. After that, he went out of control and robbed the Japanese concession, formed an all-German weapons brigade, trained the Iron Army, went north to suppress bandits, fought the bloody battle on the Great Wall, and sent the advance team to the Northeast for bloodletting.